class_docstr: The solver interface implemented by wrapper classes
docstr: Must be implemented by subclasses
docstr_tok: ["Must","be","implemented","by","subclasses"]
code: def solve(self):
      """Must be implemented by subclasses"""
  
imports: from numpy.linalg import LinAlgError
  import numpy
  from datetime import datetime
  from joblib import Parallel, delayed
  from sklearn.utils import check_random_state
  import abc
  import functools
  import time
  import warnings
  import traceback
  from .arima import ARIMA
  from ..warnings import ModelFitWarning
  from ._context import ContextType, ContextStore
  from .None import _validation
  from ..compat import statsmodels
label_desc: Use image node_id 1 for calling the _SolverMixin obj's underlying member method code with example usage: obj.solve() without return types